<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="轮播标题" prop="title">
        <el-input
          v-model="queryParams.title"
          placeholder="请输入图片标题"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['data:carousel:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['data:carousel:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['data:carousel:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['data:carousel:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="carouselList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="id" align="center" prop="carouselId" />
      <el-table-column label="图的标题" align="center" prop="title" />
      <el-table-column label="图的描述" align="center" prop="description" />
            <el-table-column label="轮播图" align="center" prop="imageUrl">
        <template v-slot:default="scope">

          <el-image :src="scope.row.imageUrl">
          </el-image>

        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['data:carousel:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['data:carousel:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    
    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改轮播对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="图片标题" prop="title">
          <el-input v-model="form.title" placeholder="请输入轮播图的标题" />
        </el-form-item>
        <el-form-item label="图片描述" prop="description">
          <el-input v-model="form.description" type="textarea" placeholder="请输入内容" />
        </el-form-item>
        <el-form-item label="轮播图" prop="imageUrl">
          <el-upload
  class="avatar-uploader"
  :action="upload.url"
  :show-file-list="false"
  :headers="upload.headers"
  :on-success="handleAvatarSuccess"
  :before-upload="beforeAvatarUpload">
  <img v-if="form.imageUrl" :src="form.imageUrl" class="avatar">
  <i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCarousel, getCarousel, delCarousel, addCarousel, updateCarousel } from "@/api/data/carousel";
import { getToken } from "@/utils/auth";
export default {
  name: "Carousel",
  data() {
    return {
      // 轮播图地址
      // 上传参数
upload: {
  // 是否禁用上传
  // isUploading: false,
  // 设置上传的请求头部
  headers: { Authorization: "Bearer " + getToken() },
  // 上传的地址
  url: process.env.VUE_APP_BASE_API + '/file/upload',
  // 上传的文件列表
  fileList: []
},
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 轮播表格数据
      carouselList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        title: null,
        description: null,
        imageUrl: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
         title: [
            { required: true, message: '标题不能为空', trigger: 'blur' }
          ]
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    test(row){
        console.log(row)
    },
      handleAvatarSuccess(res, file) {
        this.form.imageUrl = res.msg;
      },
      beforeAvatarUpload(file) {
        const isJPGPng = file.type === 'image/jpeg'|| file.type === 'image/png';
        const isLt2M = file.size / 1024 / 1024 < 2;

        if (!isJPGPng) {
          this.$message.error('上传头像图片只能是 JPG 或者PNG格式!');
        }
        if (!isLt2M) {
          this.$message.error('上传头像图片大小不能超过 2MB!');
        }
        return isJPGPng && isLt2M;
      },
    /** 查询轮播列表 */
    getList() {
      this.loading = true;
      listCarousel(this.queryParams).then(response => {
        this.carouselList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        carouselId: null,
        title: null,
        description: null,
        imageUrl: null
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.carouselId)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加轮播";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const carouselId = row.carouselId || this.ids
      getCarousel(carouselId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改轮播";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.carouselId != null) {
            updateCarousel(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCarousel(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const carouselIds = row.carouselId || this.ids;
      this.$modal.confirm('是否确认删除轮播编号为"' + carouselIds + '"的数据项？').then(function() {
        return delCarousel(carouselIds);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('data/carousel/export', {
        ...this.queryParams
      }, `carousel_${new Date().getTime()}.xlsx`)
    }
  }
};
</script>
<style scoped>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 100%;
    height: 100%;
    display: block;
  }
</style>